#define NULL_SEG 0x00
#define KERNEL_CODE_SEG 0x08
#define KERNEL_DATA_SEG 0x10
#define USER_CODE_SEG   0x18
#define USER_DATA_SEG   0x20
#define TSS_SEG			0x28
#define INIT_SP			0x001C0000
#define CPL0 0x0
#define CPL1 0x1
#define CPL2 0x2
#define CPL3 0x3
